US20040242219A1 - Wireless communication device and usage band determination method - Google Patents

Wireless communication device and usage band determination method Download PDF

Info

Publication number
US20040242219A1
US20040242219A1 US10/489,097 US48909704A US2004242219A1 US 20040242219 A1 US20040242219 A1 US 20040242219A1 US 48909704 A US48909704 A US 48909704A US 2004242219 A1 US2004242219 A1 US 2004242219A1
Authority
US
United States
Prior art keywords
bandwidth
wireless communication
data
real time
time application
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US10/489,097
Inventor
Yuji Oie
Hiroyuki Koga
Takahiro Shoji
Osamu Kato
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Assigned to OIE, YUJI, KOGA, HIROYUKI, MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. reassignment OIE, YUJI ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KATO, OSAMU, KOGA, HIROYUKI, OIE, YUJI, SHOJI, TAKAHIRO
Publication of US20040242219A1 publication Critical patent/US20040242219A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/11—Identifying congestion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/19—Flow control; Congestion control at layers above the network layer
    • H04L47/193—Flow control; Congestion control at layers above the network layer at the transport layer, e.g. TCP related
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
    • H04L47/2416—Real-time traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
    • H04L47/2425—Traffic characterised by specific attributes, e.g. priority or QoS for supporting services specification, e.g. SLA
    • H04L47/2433—Allocation of priorities to traffic types
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/27—Evaluation or update of window size, e.g. using information derived from acknowledged [ACK] packets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/80—Actions related to the user profile or the type of traffic
    • H04L47/801—Real time traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/82—Miscellaneous aspects
    • H04L47/822—Collecting or measuring resource availability data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/82—Miscellaneous aspects
    • H04L47/824—Applicable to portable or mobile terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/83—Admission control; Resource allocation based on usage prediction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
    • H04L69/163—In-band adaptation of TCP data exchange; In-band control procedures
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/10—Flow control between communication endpoints
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters
    • H04W28/20—Negotiating bandwidth
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/24—Negotiating SLA [Service Level Agreement]; Negotiating QoS [Quality of Service]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/04—Registration at HLR or HSS [Home Subscriber Server]

Definitions

  • the present invention relates to wireless communication apparatus and a usage bandwidth determination method, and particularly relates to the wireless communication apparatus and a usage bandwidth determination method used in a wireless communication system where a TCP (Transmission Control Protocol) flow and a UDP (User Datagram Protocol) flow coexist.
  • TCP Transmission Control Protocol
  • UDP User Datagram Protocol
  • DiffServ Differentiated Services
  • CoS class of service
  • routing is executed depending on the priority of the CoS, thereby enabling communication not only based on the congestion state of the communication path but also based on the priority of each dataflow.
  • Such a communication schemes taking into account the QoS such as DiffServ are generally used in wired networks.
  • the communication scheme taking the QoS into account is disclosed in Laid-Open Japanese Patent Publication No.2000-295276, as a technique for introducing into an IP network which is a narrower bandwidth provided with a wireless link with higher data error rates compared to the wired network.
  • the QoS of the dataflow is guaranteed by changing the radio bandwidth by use of a traffic quantity of each dataflow, communication quality information between radio sections provided from a wireless base station apparatus, and information of effective traffic and retransmission provided from a subscriber switchboard.
  • FIG. 1 is an illustrative case of the above-described problems in the wireless communication system where a TCP flow and a UDP flow are mixed.
  • the radio bandwidth is fixed to be W′, therefore when the usage bandwidth for the TCP flow shown by the lateral lines fluctuates due to flow control on the transmission side, the usage bandwidth occupies the bandwidth for the UDP flow shown by the vertical lines. That is, the bandwidth for the UDP flow, which is real time application data, is not secured, resulting in the delay of the real time application data or packet discard. In other words, the QoS of the UDP flow is not guaranteed.
  • An object of the present invention is to guarantee the QoS of real time application data in a wireless communication system using a fixed radio bandwidth, without changing the configurations of the existing base station apparatus and IP network.
  • a subject of the present invention is to provide a guaranteed bandwidth for the UDP flow, which is a real time application, by limiting the bandwidth for the TCP flow when transmitting the UDP flow and the TCP flow at the same time in a fixed radio bandwidth.
  • wireless communication apparatus is configured including acquiring means for acquiring a required bandwidth for transmitting fixed rate data that can be transmitted at a fixed data rate, and estimation means for estimating an available bandwidth for transmitting variable rate data that can be transmitted at variable data rates, based on the acquired required bandwidth and a predetermined radio bandwidth for use for wireless communication.
  • a usage bandwidth determination method has the steps of: acquiring the required bandwidth for transmitting fixed rate data that is transmitted at a fixed data rate; and estimating an available bandwidth for transmitting the variable rate data that can be transmitted at variable data rates, based on the acquired required bandwidth and a predetermined radio bandwidth for use for the wireless communication.
  • FIG. 1 is a view showing an example of conventional usage of the radio bandwidth
  • FIG. 2 is a view showing an example of the configurations of an IP network and a wireless communication system according to a first embodiment of the present invention
  • FIG. 3 is a block diagram showing the configuration of a wireless communication terminal apparatus according to the first embodiment
  • FIG. 4 is a view showing an example of a data field of a TCP segment according to the first embodiment
  • FIG. 5 is a view showing an example of using a radio bandwidth according to the first embodiment.
  • FIG. 6 is a block diagram showing the configuration of the wireless communication terminal apparatus according to the second embodiment of the present invention.
  • FIG. 2 is a view showing an example of an IP network and a wireless communication system.
  • a wireless communication terminal apparatus 10 and a base station apparatus 20 communicate real time application data, which is a UDP flow, and non-real time application data, which is a TCP flow, sharing a predetermined radio bandwidth.
  • the base station apparatus 20 communicates with a fixed terminal 40 or a server 50 via an IP network 30 .
  • FIG. 3 is a block diagram showing the configuration of the wireless communication terminal apparatus 10 .
  • the wireless communication terminal apparatus 10 shown in FIG. 3 includes a non-real time application 100 , a TCP control section 110 , a real time application 120 , a UDP control section 130 , an IP control section 140 , a retransmission control section 150 , a wireless transmission reception section 160 , a wireless resource control section 170 , a bandwidth estimation section 180 , and an awnd (Advertised WiNDow) estimation section 190 .
  • a non-real time application 100 includes a non-real time application 100 , a TCP control section 110 , a real time application 120 , a UDP control section 130 , an IP control section 140 , a retransmission control section 150 , a wireless transmission reception section 160 , a wireless resource control section 170 , a bandwidth estimation section 180 , and an awnd (Advertised WiNDow) estimation section 190 .
  • the non-real time application 100 provides a non-real time application service that can be transmitted at variable data rates such as FTP (File Transfer Protocol) and WWW (World Wide Web) browsing.
  • the TCP control section 110 forms a TCP segment by adding a TCP header such as a source port number and a sequence number to non-real time application data.
  • the real time application 120 provides a real time application service such as voice and moving image, which are delay sensitive and require a fixed data rate.
  • the UDP control section 130 forms a UDP segment by adding a port number to real time application data.
  • the IP control section 140 generates an IP packet by adding an IP header such as a source address and a destination address to the TCP segment and the UDP segment.
  • the retransmission control section 150 performs retransmission control in a wireless link by dividing the IP packet into predetermined sizes.
  • the wireless transmission reception section 160 applies predetermined radio processing such as encoding and modulation to the packet divided into predetermined sizes, to transmit via an antenna.
  • the wireless resource control section 170 negotiates with the base station apparatus 20 and determines a usable radio bandwidth.
  • the bandwidth estimation section 180 estimates the available bandwidth for the non-real time application, from the usable radio bandwidth and the required bandwidth for the real time application.
  • the awnd estimation section 190 estimates the maximum awnd that shows the maximum amount of the packet that can be received in the wireless communication terminal apparatus 10 .
  • the wireless resource control section 170 negotiates with the base station apparatus 20 and determines the usable radio bandwidth. The determined radio bandwidth is notified to the bandwidth estimation section 180 . Simultaneously, by the real time application 120 , the bandwidth required for transmitting the real time application data is notified to the bandwidth estimation section 180 .
  • the bandwidth estimation section 180 the required bandwidth for the real time application data is subtracted from the usable radio bandwidth, and the available bandwidth for the non-real time application data is calculated.
  • the calculated available bandwidth is notified to the awnd estimation section 190 .
  • the awnd estimation section 190 estimates the maximum awnd of the TCP based on the available bandwidth allowed for the non-real time application data and outputs the result to the TCP control section 110 .
  • the maximum awnd estimated here corresponds to a window size capable of securing the usage bandwidth for the UDP flow for transmitting the real time application data in the radio bandwidth between the wireless communication terminal apparatus 10 and the base station apparatus 20 .
  • the window size actually used is subtracted from the maximum awnd, and the receivable awnd is thus calculated.
  • the TCP segment having the data field shown in FIG. 4 is generated from the non-real time application data (TCP data) generated by the non-real time application 100 .
  • the receivable awnd is recorded in the window field of the TCP segment.
  • the TCP segment is outputted to the IP control section 140 and added with the IP header such as a source address and a destination address, and an IP packet is generated. Then, by the retransmission control section 150 , the IP packet is divided into predetermined sizes.
  • the wireless transmission reception section 160 applies predetermined radio processing such as encoding and modulation to the packet divided into predetermined sizes, to transmit via an antenna.
  • the transmitted packet is received by the base station apparatus 20 , and from the base station apparatus 20 , the packet is received by the fixed terminal 40 and the server 50 via the IP network 30 .
  • the receivable awnd included in the TCP header of the received packet and a cwnd (Congestion WiNDow) showing a transmittable window size for the apparatus are compared, and the next TCP segment is sent with the smaller window size.
  • the receivable awnd is smaller, the fixed terminal 40 and the server 50 send the TCP segment up to the number of the window sizes of the receivable awnd.
  • the receivable awnd is calculated so as to secure the required bandwidth for the real time application data, which is a UDP flow. Therefore, when the TCP flow is sent to the wireless communication terminal apparatus 10 from the base station apparatus 20 , the usage bandwidth for the UDP flow needs not be used.
  • the usage bandwidth for transmitting the TCP flow shown by the lateral lines in the figure is WT at maximum, and the bandwidth used for transmitting the UDP flow shown by the vertical lines in the figure can be WU at all times.
  • the transmitted TCP segment is sent to the wireless communication terminal apparatus 10 via the IP network 30 and the base station apparatus 20 .
  • the packet is received by the wireless transmission reception section 160 via an antenna, and the wireless transmission reception section 160 applies predetermined radio processing such as demodulation and decoding to the packet.
  • the retransmission control section 150 executes retransmission control, and the IP packet is assembled from the received packet.
  • the IP packet is outputted via IP control section 140 , and the non-real time application data is outputted to the non-real time application 100 via TCP control section 110 and processed, and the real time application data is outputted to the real time application 120 via the UDP control section 130 and processed.
  • the wireless communication terminal apparatus estimates the available bandwidth for transmitting the non-real time application data by subtracting the required bandwidth for the real time application data from the radio bandwidth used in the wireless communication. Based on the estimated available bandwidth, the awnd of window size that can be received by its own receiver is calculated, and, the calculated awnd is notified to the fixed terminal and the server, which are transmit sides connected to the IP network. Consequently, the fixed terminal and the server send the non-real time application data of the amount that can be transmitted, while securing the bandwidth for the real time application data. In this way, in the wireless communication system where the fixed radio bandwidth is used, the QoS of the real time application data can be guaranteed without changing the configurations of the existing base station apparatus and the IP network.
  • the base station apparatus 20 send the TCP segment where the receivable awnd is recorded.
  • FIG. 6 is a block diagram showing the configuration of the wireless communication terminal apparatus 10 .
  • the parts identical to those in FIG. 3 are assigned the same numerals without further explanation.
  • a cwnd estimation section 200 estimates the maximum cwnd that shows the maximum amount of the packets that can be transmitted by the wireless communication terminal apparatus 10 from the available bandwidth for the non-real time application.
  • the wireless resource control section 170 negotiates with the base station apparatus 20 , which is a communicating party, when the wireless communication terminal apparatus 10 changes over from the idle mode to the communication mode, and determines a usable radio bandwidth.
  • the determined radio bandwidth is notified to the bandwidth estimation section 180 .
  • the bandwidth required for transmitting the real time application data is notified to the bandwidth estimation section 180 .
  • the bandwidth estimation section 180 the required bandwidth for the real time application data is subtracted from the usable radio bandwidth, and the available bandwidth for the non-real time application data is calculated.
  • the calculated available bandwidth is notified to the cwnd estimation section 200 .
  • the cwnd estimation section 200 estimates the maximum cwnd of the TCP based on the available bandwidth allowed for the non-real time application data, to output to the TCP control section 110 .
  • the maximum cwnd estimated here corresponds to a window size capable of securing the usage bandwidth for the UDP flow for transmitting the real time application data in the radio bandwidth between the wireless communication terminal apparatus 10 and the base station apparatus 20 .
  • the window size actually used is subtracted from the maximum cwnd, and the transmittable cwnd is calculated.
  • the TCP segment transmitted from the base station apparatus 20 is processed by the TCP control section 110 , and the receivable awnd of the base station apparatus 20 is acquired. Then, the receivable awnd and the transmittable cwnd are compared by the TCP control section 110 , and the next TCP segment is sent with the smaller window size.
  • the wireless communication terminal apparatus 10 sends the TCP segment up to the number of the window sizes of the receivable awnd.
  • the receivable awnd is smaller than the transmittable cwnd calculated so as to secure the required bandwidth for the real time application data, which is a UDP flow.
  • the usage bandwidth for the UDP flow needs not to be used.
  • the wireless communication terminal apparatus 10 sends the TCP segment up to the number of the window sizes of the transmittable cwnd of its own transmitter.
  • the transmittable cwnd is calculated so as to secure the required bandwidth for the real time application data, which is a UDP flow. Therefore, the usage bandwidth for the UDP flow needs not be used.
  • the wireless communication terminal apparatus estimates the available bandwidth for transmitting the non-real time application data by subtracting the required bandwidth for the real time application data from the radio bandwidth used in wireless communication. Based on the estimated available bandwidth, the cwnd of a window size that can be transmitted by its own transmitter is calculated. The calculated cwnd and the awnd of a window size that can be received by the base station apparatus, which is a communicating party, are compared. The data is transmitted with the smaller window size. Consequently, the non-real time application data of the amount that can be transmitted, while securing the bandwidth for the real time application data is sent. In this way, in the wireless communication system where the fixed radio bandwidth is used, the QoS of the real time application data on an uplink channel can be guaranteed.
  • the QoS of real time application data can be guaranteed in the wireless communication system where the fixed radio bandwidth is used, without changing the configurations of the existing base station apparatus and the IP network.
  • the present invention is applicable to wireless communication apparatus and a usage bandwidth determination method. More particularly, the present invention is applicable to a wireless communication apparatus and a usage bandwidth determination method used in a wireless communication system where a TCP flow and a UDP flow coexist.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Computer Security & Cryptography (AREA)
  • Databases & Information Systems (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Small-Scale Networks (AREA)

Abstract

In a wireless communication system where a fixed radio bandwidth is used, a wireless communication apparatus and a usage bandwidth determination method that guarantee the QoS of real time application data without changing the configurations of the existing base station apparatus and IP network. A wireless resource control section (170) negotiates with a base station apparatus (20) when a wireless communication terminal apparatus (10) changes over from an idle mode to a communication mode, to determine a usable radio bandwidth. A bandwidth estimation section (180) estimates the available bandwidth for the non-real time application from the usable radio bandwidth and the required bandwidth for the real time application. An awnd estimation section (190) estimates the maximum awnd that shows the maximum amount of the packet that can be received in the wireless communication terminal apparatus (10) from the available bandwidth for the non-real time application.

Description

    TECHNICAL FIELD
  • The present invention relates to wireless communication apparatus and a usage bandwidth determination method, and particularly relates to the wireless communication apparatus and a usage bandwidth determination method used in a wireless communication system where a TCP (Transmission Control Protocol) flow and a UDP (User Datagram Protocol) flow coexist. [0001]
    • BACKGROUND ART
  • In the IP network today, communication methods that take into account not only the bandwidth, but also the quality of service (QoS) including delay and such, of the data communication path are under study. DiffServ (Differentiated Services) is an example of such a method taking the Qos into account, in which the class of service (CoS) is set for each flow, and in which routing is executed depending on the priority of the CoS, thereby enabling communication not only based on the congestion state of the communication path but also based on the priority of each dataflow. Such a communication schemes taking into account the QoS such as DiffServ are generally used in wired networks. [0002]
  • The communication scheme taking the QoS into account is disclosed in Laid-Open Japanese Patent Publication No.2000-295276, as a technique for introducing into an IP network which is a narrower bandwidth provided with a wireless link with higher data error rates compared to the wired network. In an intermediate switching apparatus between the IP network and a wireless communication system, the QoS of the dataflow is guaranteed by changing the radio bandwidth by use of a traffic quantity of each dataflow, communication quality information between radio sections provided from a wireless base station apparatus, and information of effective traffic and retransmission provided from a subscriber switchboard. [0003]
  • However, in the conventional method, it is necessary to change the configurations of the intermediate switching apparatus (subscriber switchboard) between the IP network and a wireless communication system and the wireless base station apparatus. In this case, the problem is that it is difficult to be applied to the existing wireless communication system. Moreover, the radio bandwidth needs to be changed in accordance with the bandwidth required for guaranteeing the QoS. However, when the required radio bandwidth can not be obtained, the problem is that it is difficult to guarantee the QoS. [0004]
  • FIG. 1 is an illustrative case of the above-described problems in the wireless communication system where a TCP flow and a UDP flow are mixed. In FIG. 1, the radio bandwidth is fixed to be W′, therefore when the usage bandwidth for the TCP flow shown by the lateral lines fluctuates due to flow control on the transmission side, the usage bandwidth occupies the bandwidth for the UDP flow shown by the vertical lines. That is, the bandwidth for the UDP flow, which is real time application data, is not secured, resulting in the delay of the real time application data or packet discard. In other words, the QoS of the UDP flow is not guaranteed. [0005]
    • DISCLOSURE OF INVENTION
  • An object of the present invention is to guarantee the QoS of real time application data in a wireless communication system using a fixed radio bandwidth, without changing the configurations of the existing base station apparatus and IP network. [0006]
  • A subject of the present invention is to provide a guaranteed bandwidth for the UDP flow, which is a real time application, by limiting the bandwidth for the TCP flow when transmitting the UDP flow and the TCP flow at the same time in a fixed radio bandwidth. [0007]
  • According to one aspect of the present invention, wireless communication apparatus is configured including acquiring means for acquiring a required bandwidth for transmitting fixed rate data that can be transmitted at a fixed data rate, and estimation means for estimating an available bandwidth for transmitting variable rate data that can be transmitted at variable data rates, based on the acquired required bandwidth and a predetermined radio bandwidth for use for wireless communication. [0008]
  • According to another aspect of the present invention, a usage bandwidth determination method has the steps of: acquiring the required bandwidth for transmitting fixed rate data that is transmitted at a fixed data rate; and estimating an available bandwidth for transmitting the variable rate data that can be transmitted at variable data rates, based on the acquired required bandwidth and a predetermined radio bandwidth for use for the wireless communication.[0009]
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a view showing an example of conventional usage of the radio bandwidth; [0010]
  • FIG. 2 is a view showing an example of the configurations of an IP network and a wireless communication system according to a first embodiment of the present invention; [0011]
  • FIG. 3 is a block diagram showing the configuration of a wireless communication terminal apparatus according to the first embodiment; [0012]
  • FIG. 4 is a view showing an example of a data field of a TCP segment according to the first embodiment; [0013]
  • FIG. 5 is a view showing an example of using a radio bandwidth according to the first embodiment; and [0014]
  • FIG. 6 is a block diagram showing the configuration of the wireless communication terminal apparatus according to the second embodiment of the present invention.[0015]
    • BEST MODE FOR CARRYING OUT THE INVENTION
  • Embodiments of the present invention will be explained below with reference to the drawings. [0016]
  • (First Embodiment) [0017]
  • FIG. 2 is a view showing an example of an IP network and a wireless communication system. In FIG. 2, a wireless [0018] communication terminal apparatus 10 and a base station apparatus 20 communicate real time application data, which is a UDP flow, and non-real time application data, which is a TCP flow, sharing a predetermined radio bandwidth. Also, the base station apparatus 20 communicates with a fixed terminal 40 or a server 50 via an IP network 30.
  • FIG. 3 is a block diagram showing the configuration of the wireless [0019] communication terminal apparatus 10. The wireless communication terminal apparatus 10 shown in FIG. 3 includes a non-real time application 100, a TCP control section 110, a real time application 120, a UDP control section 130, an IP control section 140, a retransmission control section 150, a wireless transmission reception section 160, a wireless resource control section 170, a bandwidth estimation section 180, and an awnd (Advertised WiNDow) estimation section 190.
  • The [0020] non-real time application 100 provides a non-real time application service that can be transmitted at variable data rates such as FTP (File Transfer Protocol) and WWW (World Wide Web) browsing. The TCP control section 110 forms a TCP segment by adding a TCP header such as a source port number and a sequence number to non-real time application data. The real time application 120 provides a real time application service such as voice and moving image, which are delay sensitive and require a fixed data rate. The UDP control section 130 forms a UDP segment by adding a port number to real time application data.
  • The [0021] IP control section 140 generates an IP packet by adding an IP header such as a source address and a destination address to the TCP segment and the UDP segment. The retransmission control section 150 performs retransmission control in a wireless link by dividing the IP packet into predetermined sizes. The wireless transmission reception section 160 applies predetermined radio processing such as encoding and modulation to the packet divided into predetermined sizes, to transmit via an antenna.
  • When the wireless [0022] communication terminal apparatus 10 changes over from an idle mode to a communication mode, the wireless resource control section 170 negotiates with the base station apparatus 20 and determines a usable radio bandwidth. The bandwidth estimation section 180 estimates the available bandwidth for the non-real time application, from the usable radio bandwidth and the required bandwidth for the real time application. From the available bandwidth for the non-real time application, the awnd estimation section 190 estimates the maximum awnd that shows the maximum amount of the packet that can be received in the wireless communication terminal apparatus 10.
  • Next, operation of the wireless [0023] communication terminal apparatus 10 having the above-described configuration will be explained.
  • First, at the time of performing transmitting operations, when the wireless [0024] communication terminal apparatus 10 changes over from the idle mode to the communication mode, the wireless resource control section 170 negotiates with the base station apparatus 20 and determines the usable radio bandwidth. The determined radio bandwidth is notified to the bandwidth estimation section 180. Simultaneously, by the real time application 120, the bandwidth required for transmitting the real time application data is notified to the bandwidth estimation section 180.
  • Then, by the [0025] bandwidth estimation section 180, the required bandwidth for the real time application data is subtracted from the usable radio bandwidth, and the available bandwidth for the non-real time application data is calculated. The calculated available bandwidth is notified to the awnd estimation section 190. Then, the awnd estimation section 190 estimates the maximum awnd of the TCP based on the available bandwidth allowed for the non-real time application data and outputs the result to the TCP control section 110. The maximum awnd estimated here corresponds to a window size capable of securing the usage bandwidth for the UDP flow for transmitting the real time application data in the radio bandwidth between the wireless communication terminal apparatus 10 and the base station apparatus 20.
  • Then, by the [0026] TCP control section 110, the window size actually used is subtracted from the maximum awnd, and the receivable awnd is thus calculated. Moreover, by the TCP control section 110, the TCP segment having the data field shown in FIG. 4 is generated from the non-real time application data (TCP data) generated by the non-real time application 100. At this time, the receivable awnd is recorded in the window field of the TCP segment.
  • The TCP segment is outputted to the [0027] IP control section 140 and added with the IP header such as a source address and a destination address, and an IP packet is generated. Then, by the retransmission control section 150, the IP packet is divided into predetermined sizes. The wireless transmission reception section 160 applies predetermined radio processing such as encoding and modulation to the packet divided into predetermined sizes, to transmit via an antenna. The transmitted packet is received by the base station apparatus 20, and from the base station apparatus 20, the packet is received by the fixed terminal 40 and the server 50 via the IP network 30. When the fixed terminal 40 and the server 50 transmit data to the wireless communication terminal apparatus 10, the receivable awnd included in the TCP header of the received packet and a cwnd (Congestion WiNDow) showing a transmittable window size for the apparatus are compared, and the next TCP segment is sent with the smaller window size. When the receivable awnd is smaller, the fixed terminal 40 and the server 50 send the TCP segment up to the number of the window sizes of the receivable awnd. However, the receivable awnd is calculated so as to secure the required bandwidth for the real time application data, which is a UDP flow. Therefore, when the TCP flow is sent to the wireless communication terminal apparatus 10 from the base station apparatus 20, the usage bandwidth for the UDP flow needs not be used.
  • Specifically, as shown in FIG. 5, for example, even when the radio bandwidth used between the wireless [0028] communication terminal apparatus 10 and the base station apparatus 20 is fixed to W, the usage bandwidth for transmitting the TCP flow shown by the lateral lines in the figure is WT at maximum, and the bandwidth used for transmitting the UDP flow shown by the vertical lines in the figure can be WU at all times.
  • Then, the transmitted TCP segment is sent to the wireless [0029] communication terminal apparatus 10 via the IP network 30 and the base station apparatus 20. The packet is received by the wireless transmission reception section 160 via an antenna, and the wireless transmission reception section 160 applies predetermined radio processing such as demodulation and decoding to the packet. The retransmission control section 150 executes retransmission control, and the IP packet is assembled from the received packet. The IP packet is outputted via IP control section 140, and the non-real time application data is outputted to the non-real time application 100 via TCP control section 110 and processed, and the real time application data is outputted to the real time application 120 via the UDP control section 130 and processed.
  • According to the present invention, the wireless communication terminal apparatus estimates the available bandwidth for transmitting the non-real time application data by subtracting the required bandwidth for the real time application data from the radio bandwidth used in the wireless communication. Based on the estimated available bandwidth, the awnd of window size that can be received by its own receiver is calculated, and, the calculated awnd is notified to the fixed terminal and the server, which are transmit sides connected to the IP network. Consequently, the fixed terminal and the server send the non-real time application data of the amount that can be transmitted, while securing the bandwidth for the real time application data. In this way, in the wireless communication system where the fixed radio bandwidth is used, the QoS of the real time application data can be guaranteed without changing the configurations of the existing base station apparatus and the IP network. [0030]
  • (Second Embodiment) [0031]
  • The configurations of the IP network and the wireless communication system according to a second embodiment of the present invention are the same as those of FIG. 2, and so explanation is omitted here. In the present embodiment, the [0032] base station apparatus 20 send the TCP segment where the receivable awnd is recorded.
  • FIG. 6 is a block diagram showing the configuration of the wireless [0033] communication terminal apparatus 10. In the wireless communication terminal apparatus in FIG. 6, the parts identical to those in FIG. 3 are assigned the same numerals without further explanation.
  • A [0034] cwnd estimation section 200 estimates the maximum cwnd that shows the maximum amount of the packets that can be transmitted by the wireless communication terminal apparatus 10 from the available bandwidth for the non-real time application.
  • Next, the operation of the wireless [0035] communication terminal apparatus 10 having the above-described configuration will be explained.
  • First, in the transmission operation, the wireless [0036] resource control section 170 negotiates with the base station apparatus 20, which is a communicating party, when the wireless communication terminal apparatus 10 changes over from the idle mode to the communication mode, and determines a usable radio bandwidth. The determined radio bandwidth is notified to the bandwidth estimation section 180. Simultaneously, by the real time application 120, the bandwidth required for transmitting the real time application data is notified to the bandwidth estimation section 180.
  • Then, by the [0037] bandwidth estimation section 180, the required bandwidth for the real time application data is subtracted from the usable radio bandwidth, and the available bandwidth for the non-real time application data is calculated. The calculated available bandwidth is notified to the cwnd estimation section 200. Then, the cwnd estimation section 200 estimates the maximum cwnd of the TCP based on the available bandwidth allowed for the non-real time application data, to output to the TCP control section 110. The maximum cwnd estimated here corresponds to a window size capable of securing the usage bandwidth for the UDP flow for transmitting the real time application data in the radio bandwidth between the wireless communication terminal apparatus 10 and the base station apparatus 20.
  • Then, by the [0038] TCP control section 110, the window size actually used is subtracted from the maximum cwnd, and the transmittable cwnd is calculated.
  • Meanwhile, the TCP segment transmitted from the [0039] base station apparatus 20 is processed by the TCP control section 110, and the receivable awnd of the base station apparatus 20 is acquired. Then, the receivable awnd and the transmittable cwnd are compared by the TCP control section 110, and the next TCP segment is sent with the smaller window size. When the receivable awnd is smaller, the wireless communication terminal apparatus 10 sends the TCP segment up to the number of the window sizes of the receivable awnd. However, the receivable awnd is smaller than the transmittable cwnd calculated so as to secure the required bandwidth for the real time application data, which is a UDP flow. Therefore, the usage bandwidth for the UDP flow needs not to be used. Moreover, when the transmittable cwnd is smaller, the wireless communication terminal apparatus 10 sends the TCP segment up to the number of the window sizes of the transmittable cwnd of its own transmitter. However, the transmittable cwnd is calculated so as to secure the required bandwidth for the real time application data, which is a UDP flow. Therefore, the usage bandwidth for the UDP flow needs not be used.
  • According to this embodiment, the wireless communication terminal apparatus estimates the available bandwidth for transmitting the non-real time application data by subtracting the required bandwidth for the real time application data from the radio bandwidth used in wireless communication. Based on the estimated available bandwidth, the cwnd of a window size that can be transmitted by its own transmitter is calculated. The calculated cwnd and the awnd of a window size that can be received by the base station apparatus, which is a communicating party, are compared. The data is transmitted with the smaller window size. Consequently, the non-real time application data of the amount that can be transmitted, while securing the bandwidth for the real time application data is sent. In this way, in the wireless communication system where the fixed radio bandwidth is used, the QoS of the real time application data on an uplink channel can be guaranteed. [0040]
  • As described above, according to the present invention, the QoS of real time application data can be guaranteed in the wireless communication system where the fixed radio bandwidth is used, without changing the configurations of the existing base station apparatus and the IP network. [0041]
  • This present application is based on Japanese Patent Application No.2002-156857 filed on May 30, 2002, entire content of which is expressly incorporated herein by reference. [0042]
    • INDUSTRIAL APPLICABILITY
  • The present invention is applicable to wireless communication apparatus and a usage bandwidth determination method. More particularly, the present invention is applicable to a wireless communication apparatus and a usage bandwidth determination method used in a wireless communication system where a TCP flow and a UDP flow coexist. [0043]

Claims (6)

1. A wireless communication apparatus comprising:
an acquiring section that acquires a required bandwidth for transmitting fixed rate data that is transmitted at a fixed data rate; and
an estimation section that estimates an available bandwidth for transmitting variable rate data that can be transmitted at a variable data rate based on the acquired required bandwidth and a predetermined radio bandwidth for use for wireless communication.
2. The wireless communication apparatus according to claim 1, wherein the estimation section estimates the available bandwidth for the variable rate data by subtracting the acquired required bandwidth from the predetermined radio bandwidth.
3. The wireless communication apparatus according to claim 1, further comprising:
a determination section that determines a maximum receivable amount of the variable rate data in accordance with the available bandwidth for the variable rate data estimated by the estimation section; and
a transmission section that transmits information including the determined maximum receivable amount of the variable rate data.
4. The wireless communication apparatus according to claim 1, further comprising:
a receiving section that receives information including a maximum receivable amount of the variable rate data at a terminal of a communicating party;
a determination section that determines the maximum transmittable amount of the variable rate data in accordance with the available bandwidth for the variable rate data estimated by the estimation section; and
a transmission section that transmits data including data corresponding to a smaller variable rate data of the determined maximum transmittable amount of the variable rate data and the maximum receivable amount of the variable rate data.
5. A wireless communication terminal apparatus having the wireless communication apparatus according to claim 1.
6. A usage bandwidth determination method comprising the steps of:
acquiring a required bandwidth for transmitting fixed rate data that is transmitted at a fixed data rate; and
estimating an available bandwidth for transmitting variable rate data that can be transmitted at a variable data rate based on the acquired required bandwidth and a predetermined radio bandwidth for use for wireless communication.
US10/489,097 2002-05-30 2003-05-28 Wireless communication device and usage band determination method Abandoned US20040242219A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2002156857A JP2003348642A (en) 2002-05-30 2002-05-30 Wireless communication apparatus and wireless communication method
JP2002-156857 2002-05-30
PCT/JP2003/006631 WO2003103329A1 (en) 2002-05-30 2003-05-28 Wireless communication device and usage band determination method

Publications (1)

Publication Number Publication Date
US20040242219A1 true US20040242219A1 (en) 2004-12-02

Family

ID=29706449

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/489,097 Abandoned US20040242219A1 (en) 2002-05-30 2003-05-28 Wireless communication device and usage band determination method

Country Status (7)

Country Link
US (1) US20040242219A1 (en)
EP (1) EP1434458A1 (en)
JP (1) JP2003348642A (en)
KR (1) KR20040111325A (en)
CN (1) CN1565142A (en)
AU (1) AU2003241809A1 (en)
WO (1) WO2003103329A1 (en)

Cited By (51)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080144568A1 (en) * 2004-11-18 2008-06-19 Ntt Docomo, Inc. Mobile Communication System, Mobile Station and Radio Base Station
US20100135270A1 (en) * 2007-08-08 2010-06-03 Fujitsu Limited Communication system, call control device, base station device and recording medium
US20100197286A1 (en) * 2009-02-02 2010-08-05 At&T Corp. System and Method for Improving Cellular Telephone User Experience
US7940735B2 (en) 2006-08-22 2011-05-10 Embarq Holdings Company, Llc System and method for selecting an access point
US7948909B2 (en) 2006-06-30 2011-05-24 Embarq Holdings Company, Llc System and method for resetting counters counting network performance information at network communications devices on a packet network
US8000318B2 (en) 2006-06-30 2011-08-16 Embarq Holdings Company, Llc System and method for call routing based on transmission performance of a packet network
US8015294B2 (en) 2006-08-22 2011-09-06 Embarq Holdings Company, LP Pin-hole firewall for communicating data packets on a packet network
US8040811B2 (en) 2006-08-22 2011-10-18 Embarq Holdings Company, Llc System and method for collecting and managing network performance information
US8064391B2 (en) 2006-08-22 2011-11-22 Embarq Holdings Company, Llc System and method for monitoring and optimizing network performance to a wireless device
US8068425B2 (en) 2008-04-09 2011-11-29 Embarq Holdings Company, Llc System and method for using network performance information to determine improved measures of path states
US20110312283A1 (en) * 2010-06-18 2011-12-22 Skype Limited Controlling data transmission over a network
US8098579B2 (en) 2006-08-22 2012-01-17 Embarq Holdings Company, LP System and method for adjusting the window size of a TCP packet through remote network elements
US8102770B2 (en) 2006-08-22 2012-01-24 Embarq Holdings Company, LP System and method for monitoring and optimizing network performance with vector performance tables and engines
US8107366B2 (en) * 2006-08-22 2012-01-31 Embarq Holdings Company, LP System and method for using centralized network performance tables to manage network communications
US8111692B2 (en) 2007-05-31 2012-02-07 Embarq Holdings Company Llc System and method for modifying network traffic
US8125897B2 (en) 2006-08-22 2012-02-28 Embarq Holdings Company Lp System and method for monitoring and optimizing network performance with user datagram protocol network performance information packets
US8130793B2 (en) * 2006-08-22 2012-03-06 Embarq Holdings Company, Llc System and method for enabling reciprocal billing for different types of communications over a packet network
US8144586B2 (en) 2006-08-22 2012-03-27 Embarq Holdings Company, Llc System and method for controlling network bandwidth with a connection admission control engine
US8144587B2 (en) 2006-08-22 2012-03-27 Embarq Holdings Company, Llc System and method for load balancing network resources using a connection admission control engine
US8184549B2 (en) 2006-06-30 2012-05-22 Embarq Holdings Company, LLP System and method for selecting network egress
US8189468B2 (en) 2006-10-25 2012-05-29 Embarq Holdings, Company, LLC System and method for regulating messages between networks
US8194643B2 (en) 2006-10-19 2012-06-05 Embarq Holdings Company, Llc System and method for monitoring the connection of an end-user to a remote network
US8194555B2 (en) 2006-08-22 2012-06-05 Embarq Holdings Company, Llc System and method for using distributed network performance information tables to manage network communications
US8199653B2 (en) 2006-08-22 2012-06-12 Embarq Holdings Company, Llc System and method for communicating network performance information over a packet network
US8224255B2 (en) 2006-08-22 2012-07-17 Embarq Holdings Company, Llc System and method for managing radio frequency windows
US8223655B2 (en) 2006-08-22 2012-07-17 Embarq Holdings Company, Llc System and method for provisioning resources of a packet network based on collected network performance information
US8228791B2 (en) 2006-08-22 2012-07-24 Embarq Holdings Company, Llc System and method for routing communications between packet networks based on intercarrier agreements
US8238253B2 (en) 2006-08-22 2012-08-07 Embarq Holdings Company, Llc System and method for monitoring interlayer devices and optimizing network performance
US8274905B2 (en) 2006-08-22 2012-09-25 Embarq Holdings Company, Llc System and method for displaying a graph representative of network performance over a time period
US8289965B2 (en) 2006-10-19 2012-10-16 Embarq Holdings Company, Llc System and method for establishing a communications session with an end-user based on the state of a network connection
US8307111B1 (en) * 2010-04-13 2012-11-06 Qlogic, Corporation Systems and methods for bandwidth scavenging among a plurality of applications in a network
US8307065B2 (en) 2006-08-22 2012-11-06 Centurylink Intellectual Property Llc System and method for remotely controlling network operators
US8358580B2 (en) 2006-08-22 2013-01-22 Centurylink Intellectual Property Llc System and method for adjusting the window size of a TCP packet through network elements
US8374090B2 (en) 2006-08-22 2013-02-12 Centurylink Intellectual Property Llc System and method for routing data on a packet network
US8407765B2 (en) 2006-08-22 2013-03-26 Centurylink Intellectual Property Llc System and method for restricting access to network performance information tables
US8488447B2 (en) 2006-06-30 2013-07-16 Centurylink Intellectual Property Llc System and method for adjusting code speed in a transmission path during call set-up due to reduced transmission performance
US8531954B2 (en) 2006-08-22 2013-09-10 Centurylink Intellectual Property Llc System and method for handling reservation requests with a connection admission control engine
US8537695B2 (en) 2006-08-22 2013-09-17 Centurylink Intellectual Property Llc System and method for establishing a call being received by a trunk on a packet network
US8549405B2 (en) 2006-08-22 2013-10-01 Centurylink Intellectual Property Llc System and method for displaying a graphical representation of a network to identify nodes and node segments on the network that are not operating normally
US8576722B2 (en) 2006-08-22 2013-11-05 Centurylink Intellectual Property Llc System and method for modifying connectivity fault management packets
US8619600B2 (en) 2006-08-22 2013-12-31 Centurylink Intellectual Property Llc System and method for establishing calls over a call path having best path metrics
US8717911B2 (en) 2006-06-30 2014-05-06 Centurylink Intellectual Property Llc System and method for collecting network performance information
US8743703B2 (en) 2006-08-22 2014-06-03 Centurylink Intellectual Property Llc System and method for tracking application resource usage
US8750158B2 (en) 2006-08-22 2014-06-10 Centurylink Intellectual Property Llc System and method for differentiated billing
US9094257B2 (en) 2006-06-30 2015-07-28 Centurylink Intellectual Property Llc System and method for selecting a content delivery network
US20160164801A1 (en) * 2014-12-08 2016-06-09 Samsung Electronics Co., Ltd. Method and apparatus for setting communicating session
US9479341B2 (en) 2006-08-22 2016-10-25 Centurylink Intellectual Property Llc System and method for initiating diagnostics on a packet network node
US9826433B2 (en) * 2001-12-05 2017-11-21 Qualcomm Incorporated Method and system for flow control between a base station controller and a base transceiver station
US20180270704A1 (en) * 2017-03-16 2018-09-20 Nec Corporation Wireless access network device
US20200382991A1 (en) * 2018-01-18 2020-12-03 Samsung Electronics Co., Ltd. Method and an electronic device for dynamically controlling tcp congestion window
US11134018B2 (en) 2017-11-30 2021-09-28 Fujitsu Limited Communication device, communication system and method for controlling communication rate in the communication system

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006109006A1 (en) * 2005-04-14 2006-10-19 Virtual Access Technology Limited A data network traffic controller
WO2006129698A1 (en) * 2005-05-31 2006-12-07 Nec Corporation Mobile communication system and communication control method thereof
CN100489716C (en) * 2005-09-21 2009-05-20 国际商业机器公司 Method and sampling device for processing measure flow data
JP4612523B2 (en) * 2005-10-13 2011-01-12 株式会社日立製作所 Wireless communication system and base station
EP2081393B1 (en) * 2006-10-30 2015-04-08 Kyocera Corporation Radio communication terminal and communication method
KR100795565B1 (en) 2006-12-01 2008-01-21 한국전자통신연구원 Method and apparatus for managing polling list in mobile communication system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6212196B1 (en) * 1995-02-24 2001-04-03 Nec Corporation Multiple access communication system and method for multiple access communication
US20020126675A1 (en) * 2001-03-06 2002-09-12 Ntt Docomo, Inc. Packet transmission method and system, and packet transmitting apparatus, packet receiving apparatus, and packet transmitting/receiving apparatus
US6603975B1 (en) * 1999-04-02 2003-08-05 Hitachi, Ltd. Communication control method of controlling data flow from internet protocol network to mobile terminal
US20030202532A1 (en) * 2002-04-26 2003-10-30 Peelen B F. Communication system with a shared medium

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4588201B2 (en) * 1999-11-29 2010-11-24 パナソニック株式会社 Wireless communication system
JP4387530B2 (en) * 1999-12-24 2009-12-16 キヤノン株式会社 Wireless base station equipment
JP2001308830A (en) * 2000-04-27 2001-11-02 Victor Co Of Japan Ltd Device for transmitting radio data
JP3618074B2 (en) * 2000-05-11 2005-02-09 三菱電機株式会社 Wireless bandwidth priority allocation method
JP4754683B2 (en) * 2000-11-22 2011-08-24 三菱電機株式会社 Wireless access system and wireless access method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6212196B1 (en) * 1995-02-24 2001-04-03 Nec Corporation Multiple access communication system and method for multiple access communication
US6603975B1 (en) * 1999-04-02 2003-08-05 Hitachi, Ltd. Communication control method of controlling data flow from internet protocol network to mobile terminal
US20020126675A1 (en) * 2001-03-06 2002-09-12 Ntt Docomo, Inc. Packet transmission method and system, and packet transmitting apparatus, packet receiving apparatus, and packet transmitting/receiving apparatus
US20030202532A1 (en) * 2002-04-26 2003-10-30 Peelen B F. Communication system with a shared medium

Cited By (109)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9826433B2 (en) * 2001-12-05 2017-11-21 Qualcomm Incorporated Method and system for flow control between a base station controller and a base transceiver station
US8483228B2 (en) 2004-11-18 2013-07-09 Ntt Docomo, Inc. Mobile communication system, mobile station and radio base station
US20080144568A1 (en) * 2004-11-18 2008-06-19 Ntt Docomo, Inc. Mobile Communication System, Mobile Station and Radio Base Station
US8000318B2 (en) 2006-06-30 2011-08-16 Embarq Holdings Company, Llc System and method for call routing based on transmission performance of a packet network
US9054915B2 (en) 2006-06-30 2015-06-09 Centurylink Intellectual Property Llc System and method for adjusting CODEC speed in a transmission path during call set-up due to reduced transmission performance
US8477614B2 (en) 2006-06-30 2013-07-02 Centurylink Intellectual Property Llc System and method for routing calls if potential call paths are impaired or congested
US9838440B2 (en) 2006-06-30 2017-12-05 Centurylink Intellectual Property Llc Managing voice over internet protocol (VoIP) communications
US9749399B2 (en) 2006-06-30 2017-08-29 Centurylink Intellectual Property Llc System and method for selecting a content delivery network
US9549004B2 (en) 2006-06-30 2017-01-17 Centurylink Intellectual Property Llc System and method for re-routing calls
US9154634B2 (en) 2006-06-30 2015-10-06 Centurylink Intellectual Property Llc System and method for managing network communications
US9118583B2 (en) 2006-06-30 2015-08-25 Centurylink Intellectual Property Llc System and method for re-routing calls
US9094257B2 (en) 2006-06-30 2015-07-28 Centurylink Intellectual Property Llc System and method for selecting a content delivery network
US7948909B2 (en) 2006-06-30 2011-05-24 Embarq Holdings Company, Llc System and method for resetting counters counting network performance information at network communications devices on a packet network
US8976665B2 (en) 2006-06-30 2015-03-10 Centurylink Intellectual Property Llc System and method for re-routing calls
US8717911B2 (en) 2006-06-30 2014-05-06 Centurylink Intellectual Property Llc System and method for collecting network performance information
US10230788B2 (en) 2006-06-30 2019-03-12 Centurylink Intellectual Property Llc System and method for selecting a content delivery network
US8570872B2 (en) 2006-06-30 2013-10-29 Centurylink Intellectual Property Llc System and method for selecting network ingress and egress
US8488447B2 (en) 2006-06-30 2013-07-16 Centurylink Intellectual Property Llc System and method for adjusting code speed in a transmission path during call set-up due to reduced transmission performance
US10560494B2 (en) 2006-06-30 2020-02-11 Centurylink Intellectual Property Llc Managing voice over internet protocol (VoIP) communications
US8184549B2 (en) 2006-06-30 2012-05-22 Embarq Holdings Company, LLP System and method for selecting network egress
US8670313B2 (en) 2006-08-22 2014-03-11 Centurylink Intellectual Property Llc System and method for adjusting the window size of a TCP packet through network elements
US9042370B2 (en) 2006-08-22 2015-05-26 Centurylink Intellectual Property Llc System and method for establishing calls over a call path having best path metrics
US8194555B2 (en) 2006-08-22 2012-06-05 Embarq Holdings Company, Llc System and method for using distributed network performance information tables to manage network communications
US8199653B2 (en) 2006-08-22 2012-06-12 Embarq Holdings Company, Llc System and method for communicating network performance information over a packet network
US8213366B2 (en) 2006-08-22 2012-07-03 Embarq Holdings Company, Llc System and method for monitoring and optimizing network performance to a wireless device
US8223654B2 (en) 2006-08-22 2012-07-17 Embarq Holdings Company, Llc Application-specific integrated circuit for monitoring and optimizing interlayer network performance
US8224255B2 (en) 2006-08-22 2012-07-17 Embarq Holdings Company, Llc System and method for managing radio frequency windows
US8223655B2 (en) 2006-08-22 2012-07-17 Embarq Holdings Company, Llc System and method for provisioning resources of a packet network based on collected network performance information
US8228791B2 (en) 2006-08-22 2012-07-24 Embarq Holdings Company, Llc System and method for routing communications between packet networks based on intercarrier agreements
US8238253B2 (en) 2006-08-22 2012-08-07 Embarq Holdings Company, Llc System and method for monitoring interlayer devices and optimizing network performance
US8274905B2 (en) 2006-08-22 2012-09-25 Embarq Holdings Company, Llc System and method for displaying a graph representative of network performance over a time period
US10469385B2 (en) 2006-08-22 2019-11-05 Centurylink Intellectual Property Llc System and method for improving network performance using a connection admission control engine
US10298476B2 (en) 2006-08-22 2019-05-21 Centurylink Intellectual Property Llc System and method for tracking application resource usage
US10075351B2 (en) 2006-08-22 2018-09-11 Centurylink Intellectual Property Llc System and method for improving network performance
US8307065B2 (en) 2006-08-22 2012-11-06 Centurylink Intellectual Property Llc System and method for remotely controlling network operators
US9992348B2 (en) 2006-08-22 2018-06-05 Century Link Intellectual Property LLC System and method for establishing a call on a packet network
US8358580B2 (en) 2006-08-22 2013-01-22 Centurylink Intellectual Property Llc System and method for adjusting the window size of a TCP packet through network elements
US8374090B2 (en) 2006-08-22 2013-02-12 Centurylink Intellectual Property Llc System and method for routing data on a packet network
US8407765B2 (en) 2006-08-22 2013-03-26 Centurylink Intellectual Property Llc System and method for restricting access to network performance information tables
US8472326B2 (en) 2006-08-22 2013-06-25 Centurylink Intellectual Property Llc System and method for monitoring interlayer devices and optimizing network performance
US9929923B2 (en) 2006-08-22 2018-03-27 Centurylink Intellectual Property Llc System and method for provisioning resources of a packet network based on collected network performance information
US8144587B2 (en) 2006-08-22 2012-03-27 Embarq Holdings Company, Llc System and method for load balancing network resources using a connection admission control engine
US8488495B2 (en) 2006-08-22 2013-07-16 Centurylink Intellectual Property Llc System and method for routing communications between packet networks based on real time pricing
US8144586B2 (en) 2006-08-22 2012-03-27 Embarq Holdings Company, Llc System and method for controlling network bandwidth with a connection admission control engine
US8509082B2 (en) 2006-08-22 2013-08-13 Centurylink Intellectual Property Llc System and method for load balancing network resources using a connection admission control engine
US8520603B2 (en) 2006-08-22 2013-08-27 Centurylink Intellectual Property Llc System and method for monitoring and optimizing network performance to a wireless device
US8531954B2 (en) 2006-08-22 2013-09-10 Centurylink Intellectual Property Llc System and method for handling reservation requests with a connection admission control engine
US8537695B2 (en) 2006-08-22 2013-09-17 Centurylink Intellectual Property Llc System and method for establishing a call being received by a trunk on a packet network
US8549405B2 (en) 2006-08-22 2013-10-01 Centurylink Intellectual Property Llc System and method for displaying a graphical representation of a network to identify nodes and node segments on the network that are not operating normally
US8130793B2 (en) * 2006-08-22 2012-03-06 Embarq Holdings Company, Llc System and method for enabling reciprocal billing for different types of communications over a packet network
US8576722B2 (en) 2006-08-22 2013-11-05 Centurylink Intellectual Property Llc System and method for modifying connectivity fault management packets
US8619820B2 (en) 2006-08-22 2013-12-31 Centurylink Intellectual Property Llc System and method for enabling communications over a number of packet networks
US8619596B2 (en) 2006-08-22 2013-12-31 Centurylink Intellectual Property Llc System and method for using centralized network performance tables to manage network communications
US8619600B2 (en) 2006-08-22 2013-12-31 Centurylink Intellectual Property Llc System and method for establishing calls over a call path having best path metrics
US8125897B2 (en) 2006-08-22 2012-02-28 Embarq Holdings Company Lp System and method for monitoring and optimizing network performance with user datagram protocol network performance information packets
US8687614B2 (en) 2006-08-22 2014-04-01 Centurylink Intellectual Property Llc System and method for adjusting radio frequency parameters
US7940735B2 (en) 2006-08-22 2011-05-10 Embarq Holdings Company, Llc System and method for selecting an access point
US8743703B2 (en) 2006-08-22 2014-06-03 Centurylink Intellectual Property Llc System and method for tracking application resource usage
US8743700B2 (en) 2006-08-22 2014-06-03 Centurylink Intellectual Property Llc System and method for provisioning resources of a packet network based on collected network performance information
US8750158B2 (en) 2006-08-22 2014-06-10 Centurylink Intellectual Property Llc System and method for differentiated billing
US8811160B2 (en) 2006-08-22 2014-08-19 Centurylink Intellectual Property Llc System and method for routing data on a packet network
US9832090B2 (en) 2006-08-22 2017-11-28 Centurylink Intellectual Property Llc System, method for compiling network performancing information for communications with customer premise equipment
US8107366B2 (en) * 2006-08-22 2012-01-31 Embarq Holdings Company, LP System and method for using centralized network performance tables to manage network communications
US8015294B2 (en) 2006-08-22 2011-09-06 Embarq Holdings Company, LP Pin-hole firewall for communicating data packets on a packet network
US9014204B2 (en) 2006-08-22 2015-04-21 Centurylink Intellectual Property Llc System and method for managing network communications
US9813320B2 (en) 2006-08-22 2017-11-07 Centurylink Intellectual Property Llc System and method for generating a graphical user interface representative of network performance
US8102770B2 (en) 2006-08-22 2012-01-24 Embarq Holdings Company, LP System and method for monitoring and optimizing network performance with vector performance tables and engines
US9054986B2 (en) 2006-08-22 2015-06-09 Centurylink Intellectual Property Llc System and method for enabling communications over a number of packet networks
US9094261B2 (en) 2006-08-22 2015-07-28 Centurylink Intellectual Property Llc System and method for establishing a call being received by a trunk on a packet network
US8098579B2 (en) 2006-08-22 2012-01-17 Embarq Holdings Company, LP System and method for adjusting the window size of a TCP packet through remote network elements
US9112734B2 (en) 2006-08-22 2015-08-18 Centurylink Intellectual Property Llc System and method for generating a graphical user interface representative of network performance
US9806972B2 (en) 2006-08-22 2017-10-31 Centurylink Intellectual Property Llc System and method for monitoring and altering performance of a packet network
US8040811B2 (en) 2006-08-22 2011-10-18 Embarq Holdings Company, Llc System and method for collecting and managing network performance information
US9225646B2 (en) 2006-08-22 2015-12-29 Centurylink Intellectual Property Llc System and method for improving network performance using a connection admission control engine
US9225609B2 (en) 2006-08-22 2015-12-29 Centurylink Intellectual Property Llc System and method for remotely controlling network operators
US9241271B2 (en) 2006-08-22 2016-01-19 Centurylink Intellectual Property Llc System and method for restricting access to network performance information
US9241277B2 (en) 2006-08-22 2016-01-19 Centurylink Intellectual Property Llc System and method for monitoring and optimizing network performance to a wireless device
US9240906B2 (en) 2006-08-22 2016-01-19 Centurylink Intellectual Property Llc System and method for monitoring and altering performance of a packet network
US9253661B2 (en) 2006-08-22 2016-02-02 Centurylink Intellectual Property Llc System and method for modifying connectivity fault management packets
US9712445B2 (en) 2006-08-22 2017-07-18 Centurylink Intellectual Property Llc System and method for routing data on a packet network
US9660917B2 (en) 2006-08-22 2017-05-23 Centurylink Intellectual Property Llc System and method for remotely controlling network operators
US9479341B2 (en) 2006-08-22 2016-10-25 Centurylink Intellectual Property Llc System and method for initiating diagnostics on a packet network node
US9661514B2 (en) 2006-08-22 2017-05-23 Centurylink Intellectual Property Llc System and method for adjusting communication parameters
US8064391B2 (en) 2006-08-22 2011-11-22 Embarq Holdings Company, Llc System and method for monitoring and optimizing network performance to a wireless device
US9602265B2 (en) 2006-08-22 2017-03-21 Centurylink Intellectual Property Llc System and method for handling communications requests
US9621361B2 (en) 2006-08-22 2017-04-11 Centurylink Intellectual Property Llc Pin-hole firewall for communicating data packets on a packet network
US8194643B2 (en) 2006-10-19 2012-06-05 Embarq Holdings Company, Llc System and method for monitoring the connection of an end-user to a remote network
US8289965B2 (en) 2006-10-19 2012-10-16 Embarq Holdings Company, Llc System and method for establishing a communications session with an end-user based on the state of a network connection
US9521150B2 (en) 2006-10-25 2016-12-13 Centurylink Intellectual Property Llc System and method for automatically regulating messages between networks
US8189468B2 (en) 2006-10-25 2012-05-29 Embarq Holdings, Company, LLC System and method for regulating messages between networks
US8111692B2 (en) 2007-05-31 2012-02-07 Embarq Holdings Company Llc System and method for modifying network traffic
US8295870B2 (en) * 2007-08-08 2012-10-23 Fujitsu Limited Communication system, call control device, base station device and recording medium
US20100135270A1 (en) * 2007-08-08 2010-06-03 Fujitsu Limited Communication system, call control device, base station device and recording medium
US8879391B2 (en) 2008-04-09 2014-11-04 Centurylink Intellectual Property Llc System and method for using network derivations to determine path states
US8068425B2 (en) 2008-04-09 2011-11-29 Embarq Holdings Company, Llc System and method for using network performance information to determine improved measures of path states
US8326312B2 (en) 2009-02-02 2012-12-04 At&T Intellectual Property Ii, Lp System and method for improving cellular telephone user experience
US20100197286A1 (en) * 2009-02-02 2010-08-05 At&T Corp. System and Method for Improving Cellular Telephone User Experience
US8307111B1 (en) * 2010-04-13 2012-11-06 Qlogic, Corporation Systems and methods for bandwidth scavenging among a plurality of applications in a network
US9003038B1 (en) * 2010-04-13 2015-04-07 Qlogic, Corporation Systems and methods for bandwidth scavenging among a plurality of applications in a network
EP2561660B1 (en) * 2010-06-18 2019-09-04 Skype Controlling data transmission over a network
US20110312283A1 (en) * 2010-06-18 2011-12-22 Skype Limited Controlling data transmission over a network
US9264377B2 (en) * 2010-06-18 2016-02-16 Skype Controlling data transmission over a network
US10291545B2 (en) * 2014-12-08 2019-05-14 Samsung Electronics Co., Ltd. Method and apparatus for setting communicating session
US20160164801A1 (en) * 2014-12-08 2016-06-09 Samsung Electronics Co., Ltd. Method and apparatus for setting communicating session
US10555209B2 (en) * 2017-03-16 2020-02-04 Nec Corporation Wireless access network device
US20180270704A1 (en) * 2017-03-16 2018-09-20 Nec Corporation Wireless access network device
US11134018B2 (en) 2017-11-30 2021-09-28 Fujitsu Limited Communication device, communication system and method for controlling communication rate in the communication system
US20200382991A1 (en) * 2018-01-18 2020-12-03 Samsung Electronics Co., Ltd. Method and an electronic device for dynamically controlling tcp congestion window
US11871265B2 (en) * 2018-01-18 2024-01-09 Samsung Electronics Co., Ltd Method and an electronic device for dynamically controlling TCP congestion window

Also Published As

Publication number Publication date
WO2003103329A1 (en) 2003-12-11
KR20040111325A (en) 2004-12-31
JP2003348642A (en) 2003-12-05
CN1565142A (en) 2005-01-12
AU2003241809A1 (en) 2003-12-19
EP1434458A1 (en) 2004-06-30

Similar Documents

Publication Publication Date Title
US20040242219A1 (en) Wireless communication device and usage band determination method
US11159423B2 (en) Techniques for efficient multipath transmission
JP3769468B2 (en) Communication quality control method, communication quality control system, packet analysis device, and data transmission terminal device
AU745814B2 (en) Data transmission method in GPRS
JP4323432B2 (en) Method for improving the transmission quality of streaming media
US20080123660A1 (en) Method and apparatus for providing differentiated quality of service for packets in a particular flow
US7706276B2 (en) Systems and methods for wireless communications
US20120269150A1 (en) Wireless terminal for transmitting packets of different types
US9510354B2 (en) Method and a device for low intrusive fast estimation of the bandwidth available between two IP nodes
US20100128662A1 (en) Dynamic real-time quality management of packetized communications in a network environment
US20050102412A1 (en) Transmission performance of a transport layer protocol connection
EP2715978B1 (en) A system and method for reducing the data packet loss employing adaptive transmit queue length
US20060198376A1 (en) Communication device for IP network
Nishiyama et al. Wireless loss-tolerant congestion control protocol based on dynamic aimd theory
US20100278095A1 (en) Communication device, radio communication device, communication control method and radio communication method
WO2008053804A1 (en) Communication control device, radio communication device, communication control method, and radio communication method
EP2327176B1 (en) End-to-end qos and flow control for adaptive channels
JP3953343B2 (en) Wireless packet communication device and wireless packet communication method
JP4744457B2 (en) Communication method and communication apparatus
JP2009033676A (en) Communicating system, communication device and packet transmission method
JP4722563B2 (en) COMMUNICATION TERMINAL DEVICE, TERMINAL DEVICE, COMMUNICATION SYSTEM, COMMUNICATION METHOD, AND COMPUTER PROGRAM
JP2006352420A (en) Terminal sending and receiving quality packet including communication quality information, quality report server, and program
WO2022155916A1 (en) Method and apparatus for adjusting attribute parameter, and communication device
EP4080836A1 (en) System and method for multipath transmission
WO2009000012A1 (en) Method of communicating a data stream over a communication network

Legal Events

Date Code Title Description
AS Assignment

Owner name: OIE, YUJI, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:OIE, YUJI;KOGA, HIROYUKI;SHOJI, TAKAHIRO;AND OTHERS;REEL/FRAME:015658/0143

Effective date: 20040116

Owner name: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD., JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:OIE, YUJI;KOGA, HIROYUKI;SHOJI, TAKAHIRO;AND OTHERS;REEL/FRAME:015658/0143

Effective date: 20040116

Owner name: KOGA, HIROYUKI, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:OIE, YUJI;KOGA, HIROYUKI;SHOJI, TAKAHIRO;AND OTHERS;REEL/FRAME:015658/0143

Effective date: 20040116

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION